try sending mail with -v
type a message, followed by a "." to end
$ whereis sendmail
sendmail: /usr/sbin/sendmail /etc/sendmail.cf /etc/sendmail.cf-ORIG /etc/sendmail.cw /etc/sendmail.mc /usr/lib/sendmail /usr/man/man8/sendmail.8.gz
$ /usr/sbin/sendmail -v
mr_manny@emailaddy.com
this is a test
.
mr_manny@emailaddy.com... Connecting to mx1.emailaddy.com. via esmtp...
220 bay0-mc1-f18.bay0.emailaddy.com Sending unsolicited commercial or bulk e-mail to Microsoft's computer network is prohibited. Other restrictions are found at
http://privacy.msn.com/Anti-spam/. Violations will result in use of equipment located in California and other states. Wed, 25 Jan 2006 07:29:57 -0800
>>> EHLO sendingSERVER.domain.com
250-bay0-mc1-f18.bay0.emailaddy.com (3.1.0.18) Hello [63.151.181.253]
250-SIZE 29696000
250-PIPELINING
250-8bitmime
250-BINARYMIME
250-CHUNKING
250-AUTH LOGIN
250-AUTH=LOGIN
250 OK
>>> MAIL From:<user@sendingSERVER.domain.com> SIZE=15
250
user@sendingSERVER.domain.com....Sender OK
>>> RCPT To:<mr_manny@emailaddy.com>
250
mr_manny@emailaddy.com
>>> DATA
354 Start mail input; end with <CRLF>.<CRLF>
>>> .
250 <200601251529.k0PFTrV28437@sendingSERVER.domain.com> Queued mail for delivery
mr_manny@emailaddy.com... Sent ( <200601251529.k0PFTrV28437@sendingSERVER.domain.com> Queued mail for delivery)
Closing connection to mx1.emailaddy.com.
>>> QUIT
221 bay0-mc1-f18.bay0.emailaddy.com Service closing transmission channel